Samtbiug-ma chiite



K. F. G. MAIER. sANmNG MACHINE.A APPLICATION FILED AUG. |917.

IIIIII omen pszsns ca., #Humm To all whom it may @onces/nf Y mui?.donnine, oF'soUfrr-rnsHBuRNHAM, MASSACHUSETTS. o'

ases/Zai. Y i

lfBe/itflniown Vthat I, KARL F. lvl-Aminaoitizen of the .United States,residing atV South Ashburnham, county ofl /Vorcester,

'v andv State of VMassachusetts,Yhave. invented anl Improvement inSanding-Machines, oi' wliichithe following description, inconnectionlwith the `aceompanyingdrawings, is specification,l`ike-characters onthe difawin s representinglikepaits. Y v

he'invention to be hereinafterl described relatesfto sandingmachines,and more pai'- ticularly to that type of sanding, machines ortreatingthecurved surfacesot wooden strips. Y Y 'c An importantieature of thepresent in-V vention .consists a sandingl mach-ine vhav" inge-,sandingroll land azcurved table for supporting the Y curved strips, such forinstance-waschairvbacks, as they arei'ed by suitable feeding means overthe curved :sur-- tace ofthe table for thel action of the .sanding roll.Opposed tothe sand-ing rollin the presentiorln fot the invention isapressure roll between which andthe sanding roll Ythe cunvedstrip to betreated-.is fed.

fA'nother featurevofthe invention consists infeedingmeans formed offlexible Vfeeding members, and means orfnioving the feed-1 ing memberspathf'substantial-ly in ac-VV cord-ance with the curved surfaceo'fthetable 130.-;feedthe .curved strips over the tablev and between thesanding `and ypressure rolls.

A.Afuither objeetof the invention is to provide a sanding machine whichshall be simple in ,constructioin andefiicient in operation-1 andwherein the. parts shall be actuated by power to etfetthe desired,surfaceA treatmentof curved strips; The above and other features of theinventionwill hereinafterrb more fullydesoribed inA connection with :theaccompanying drawing which shows/one Y`good praeticalorm of. theinventiomthescope of which'is definitely set forthbyfthe claiins;v u f YY lnthe drawings: f Eigure lis aplan viewV of amaehine embedylngthe.present invention; i Y Y Y ztglfig. 2 isa fs'ectionvoj. he machineshown4 DF .igl O11 rJf1e111e;2Y.-,2,` Figf 1;# Y y Eig. 3isa detail on,an enlarged'seale, SHOW/,1111sv the relative ,ofthe guides for theflexible: feedingl members and the lcurved Serpentine table; andi. ,-iFis 4 15;' teiln'an 'enlargedA Scaley Vsiiikm'ING-imioninn.:V v l,

ASiwcifiatin f I-ettersPatentY f Patentedv 511.11613, 1919.YApplicatonrled August 30, 1917. YVSeriallo. v189,009. Y

showing one ofthe'l flexible `Vl'eeding members such 'iiexible members.Y

and one manner of securing ethe-'crossbars to` Thev machineframerinayr'be ofi-an'ylde-l` sired character and :as illustrated in:the

roll which may-be adjustablysupported inV its bearings. f Inthe presentVinstanoefof the. invention fthe sanding lroll consists. voifithecylinder @having-an abrading surface 7A and secured to'atransverseshaftfS which may be supported `in vbearings mountedc on theside-frames: ofthe machine and "adjust-5 able by means ofthe adjustingscrews 9 and 10., the construction beingVV suchY that' Y by. propermanipulation of the'iadjiisting screwsV 9 and 10, the sandingrollmaybe'movedior adjusted. on the supporting frame; Y 1 M'.Ihegpresentmaehine isi-primarily intend',- ed for the surfaeetreatmentofcurvedstrips which. are to be; yi'ed Vto ,thev sanding roll.. :Tothisend there is supported on the cross ties wrfin the present'instanceof the invention, ai supporting table hailing a Y curved j suifiacewhich-.may be substantially inconformity With fthe curved surfaee of thestripsfjto be vrtieated.. 'In -the Y.presentinstantie otA MES ATENT fthe invention,VY the tabl'eas va whole niay;

formed of two separate portions, one at each Y side oitftheverticalplane passing through the .axis of the sandinfr roll. The twoporf, tions of the table maytbe substantially alikel or, 4,modified asconditions require. In "the present instance ofthe invention, cachotthe' curved portions of the vtable f consists lof a curved supportingsurface l1 havingy ex-Al tending inwardlytherefroml the proj eetions 12:whereby the two curved portions-of the table at each side of thesandingroll be, secured in operativerelation to the sanding. roll lbysuitableA means such,-v for insta-nce, fas; thesecuring bolts 13.Theendsi of the twof portions of. thetable at .ea-ChA sideof the sand;ing,` `roll extend toward, the vertical plane3 passing through ,the exis0f the sanding rollbut Stop shortthereof, .thusjeavngena cient spacebetween the proximateends 14 for a portion of the sanding roll to extendbetween.

At the edge portions of the table, that is, at each side of the machine,there is provided a guideway 15 for flexible feeding members 16, one ateach side of the machine, the general form of the guiding walls 15 andthe face movement of the flexible members 16 being in substantialaccordance with the curvature of the table. Extending between theflexible feeding members 16, which may be formed as sprocket chains, arethe transverse bars or feeding members 17 These bars or members 17 maybesecured at each end to one of the flexible feeding members or chains 16by any Vsuitable means, and as herein shown, the flexible feedingmembers or chains 416 have :formed at intervals, the plates 18, Fig. 4,which underlie the transverse bars 17 and may be secured thereto by thebolts 19. The particular form of securing means between the flexiblefeeding members and the transverse bars 17 Eis not an essential vfeatureof the present invention, and 'may be varied within wide limits.

The transverse bars 17 aredisposed adistance apartalong theflexiblefeeding members16 to accommodate fthe curved strips 20 which are to betreated by the machine, and in order that the cross bars17 may not ridedirectly upon or inj`ure `the curved surface of the supporting table,the :guideways 15 for the flexible feeding members are raised a shortdistance above the surface of the feeding table as 'indicated at L21,the yconstruction being `such that as 'the flexible feeding members are"moved to feed Ithe strips 20 to the treatment of the sanding roll, thecross bars 1,-7 will ride closely adjacent to but preferably out 'of'contact with the curved surface'of ythe table.

The sanding roll jmay -be appropriately driven vfrom any suitable sourcefof power, and in the present instance of the invention, the shaftV 8 on`which the sanding roll is mounted, is provided with a. belt pulley 22,Fig. 1, by which driving vpower may be transmitted'to the Ysanding roll,and its speed of rotation lfa'clju"sted to :suit the conditions of use.

The flexible feedinglinembers 16 for Yfeeding thecurved `'strips in thecurved path as hereinbefore described, may be Vappropriately 'drivenfrom any suitable source of power, and as herein indicated, the flexiblefeeding members orsprocket chains 16 are engaged with sprocket wheels 23suitably mounted on a cross shaft 24 supported in bearings 'mounted onthe machine frame. Secured to the shaft-24 is a pulley 25 lwhich, bymeans of a 'belt v26, maybe `driven from a pulley`27 which'de'rivesitsmotion by `suitable connections, as for instance, the pulley 28, with asuitable source of power.

it will be apparent that the sanding roll as well as the flexiblefeeding members and cross bars, are power-driven and that thelongitudinal elements of the curved surface ofthe Vtable aresubstantially parallel to the axis of the sanding roll.

Rising from the side frames lof the machine are the pressure rollbearings 29, Fig. 2, in which is mounted the pressure roll 30 normallyunder the influence of springs 31 tending to move the Avpressure rolltoward the sanding roll and acting under the yielding pressure of thesprings, to yieldingly force the strips 20 toward the sanding roll asthey pass between the sanding 4roll and pressure roll. If desired,suitable adjusting devices such as the hand-operated adjusting screws 32may be employed for regulating the action of the .pressure roll.

In order that the leading ends vof the curved strips `to be treated maybe properly presented to the sanding roll, it is'desirable that theleading ends of the stripsshall 'first engage the sanding roll beforepassing into control of the pressure roll, andto thisfend the axis ofthe pressure roll is located to one side of the vertical plane ypassinglongitudinally through the axis fof fthe sanding roll. This is bestindicated by ,'Fig. `2 Vwherein fthe line 33 represents the verticalVplane passing longitudinally through the axisfof the sanding rollfandthe line 34 represents the vertiral plane passing longitudinally throughthe axis of the pressure .'roll.

It may be desirable in some cases A to provide the cross bar 17 of thefeeding means with devices to prevent vthe trailing len'ds of the curvedstrips-from rising with reference to Asaid cross bars; and to this endthe -present invention provides a hold-down orlclip which may be securedto each of fthe fcr'oss bars 17. In the present instance, the Lholddownor lclip is indicatedlasa strip 35 lsecured to the top of each-ofthecross bars 17 and having an overhanging portion 36 beneath which thetrailing ends-of the-curved strips may be inserted.

In operation of the machine, the attendant lplaces the curvedstrips20onthe talile 11 'at the feeding-in side o'f the machine, which asindicated by Fig. 2, is lat ithe right. The curved strips to be treatedthus rest upon the ycurved surface1of-thetable and as the flexiblefeeding' :members carry the cross bars 17 along thecurved :pathvcorresponding to the curvature of the table, they will engage thetrailing ends fof `the curved strips and force ythe vcurved strips inthe direction of feed-betweenthe `sand-- ing and pressure rolls, thecurved Kstrips being removed from the machine rat the delivery orleft-hand side viewing Fi) 2, either by the attendant or ypermittec -toautomatically fall fromthe machine.

What is claimed is 1. In a machine of the class described, thecombination of a curved table, a sanding roll extending through aportion of the curved table to act upon the Work as it is moved about,said curved table, means for rotating the sanding roll, a pressure rollopposed to the exposed portion of the sanding roll 'for pressing theWork toward the sand.- ing roll, iiexible feeding members movable inpaths substantially corresponding to the curved surface of the curvedtable, and means extending between the feeding members for engagingcurved strips placed upon the curved table and feeding them over thecurved table and between the sanding pressure rolls.

2. In a machine for sanding curved strips, the combination of ahorizontally supported sanding roll, a curved table the elements ofWhose surface are substantially parallel to the axis of the sandingroll, a pressure roll opposed to the sandingY roll With its axis to oneside of a vertical plane passing longitudinally through the axis of thesanding roll, and feeding means having clip portions adapted to overlieone end of strips placed upon the curved table and movable in a pathsubstantially corresponding to the curved surface of the table.

3. In a machine of the character described, the combination of a curvedtable, a sanding roll to act on curved pieces as they are moved over thetable, a yielding idle presserV member having a smooth surface opposedto the sanding roll for engaging and pressing the pieces toward thesanding roll, and means for engaging the trailing ends of the pieces andfeeding the latter over the table-between the sanding roll and thepresser member.

a. In a machine of the character described, the combination of a curvedtable, a sandingroll to act on the pieces as they are moved over thetable, smooth presser means for idly engaging the pieces and pressingthe same toward the sanding roll, and flexible feeding means havingelements at intervals for engaging the trailing` ends of the pieces andfeeding the same between the sanding roll and the presser means.

5. In a machine of the character described, the combination of a curvedsupport,a sanding roll to act on one side of curved pieces as they aremoved over said support, idle presser means for pressing the piecestoward the sanding roll, and flexible belts or chains having membersconnecting the same at intervals for engagement with the trailing endsof the pieces to positively feed the same over said support between thesanding roll and presser means.

In testimony whereof I have signed my name to this specification.

KARL F. G. MAIER.

copies of this patent may be obtained for ve cents each, by addressing`the Commissioner of Eatents, Washington, D. C.

